An information processing apparatus includes: circuitry that converts: a total-amount restriction value that is input into a value corresponding to a gradation value; for each of colors of color materials included in an image forming apparatus, convert a gradation value of color information into a value of a color material amount normalized using a gradation value of the color of the color information; perform total-amount restriction on the normalized and converted value of the color material amount of the each of the colors based on the converted value corresponding to the gradation value; and convert the value of the color material amount of the each of the colors after the total-amount restriction into the gradation value of the each of the colors.

An image forming apparatus is configured to obtain information indicating the capacity of a toner container. In accordance with the obtained information, a gamma table for correcting the luminance value of a printing-target image is determined and the luminance value of the image is corrected by using the determined gamma table.

A color printing system includes a printing device and other components that use color printing resources, such as calibration and ICC profiles, to complete color printing operations. These color printing resources are used for a large number of paper types stored in a paper catalog. The paper types can be further placed into paper groups within the paper catalog. The paper groups may be formed by assigning new papers into the paper catalog to those having paper types with existing calibration data and ICC profiles. These relationships are shown in a paper catalog map. The print shop can use the paper catalog map for selling paper types, providing different capabilities for paper types, and other information.

Certain examples described herein relate to mapping between an input color space and an output color space. In some cases, data representing a set of candidate output color values in the output color space is obtained for a transition region between two input color values in the input color space. A sub-region of the transition region is defined, the sub-region being associated with a target colorimetry and a target value of a metric. An output color value is selected from the set of candidate output color values. The output value has an associated value of the metric and an associated colorimetry. The selecting is based on the associated colorimetry and the target colorimetry, and the value of the metric and the target value of the metric. In some cases, mapping data is generated by assigning the selected output color value to the sub-region.

A printing system is disclosed. The printing system includes at least one physical memory device to store halftone calibration logic and one or more processors coupled with the at least one physical memory device to execute the halftone calibration logic to receive print image measurement data corresponding to a first halftone design associated with each of a plurality of pel forming elements, generate measurement data for each of the pel forming elements based on the print image measurement data, generate a uniformity compensated halftone for each of the pel forming elements based on inverse transfer functions corresponding to each of the pel forming elements and the first halftone design and transmit the uniformity compensated halftone for each of the pel forming elements.

A device comprises memory, a display characterized by a display characteristic, and processors coupled to the memory. The processors execute instructions causing the processors to receive data indicative of the display characteristic, data indicative of ambient lighting, and data indicative of content characteristics for a content item; determine a tone mapping curve for the content item based on the data indicative of content characteristics; determine a first, so-called “anchor” point along the tone mapping curve; modify a first portion of the tone mapping curve below the anchor point based on the data indicative of ambient lighting; modify a second portion of the tone mapping curve above the anchor point based on the data indicative of the display characteristic; perform tone mapping for the content item based on the modified toned mapping curve to obtain a tone mapped content item; and cause the display to display the tone mapped content item.

In an example, a method includes determining, using processing circuitry, a first print coverage vector associated with an estimated colorimetry which corresponds to a target colorimetry, wherein the estimated colorimetry of the print coverage vector is based on a first color model, the first print coverage vector being optimised relative to a first metric. The method may further include determining, using processing circuitry, a predicted colorimetry of the first print coverage vector based on a second color model.

A printing system includes an offline estimation device that provides estimates for ink or toner use for a print job at a target printing device. The offline estimation device retrieves digital front end (DFE) version information, configuration setting information, and color printing resources from the target printing device. Using the DFE version information, the offline estimation device selects a raster image processor (RIP) from a plurality of RIPs of software versions available within the printing system. The offline estimation device configures the RIP with configuration settings of the configuration setting information. The color printing resources also are pushed to the RIP. The offline estimation device provides the ink or toner use estimate using the configured RIP.

A printing system is disclosed. The printing system includes at least one physical memory device to store calibration logic and one or more processors coupled with the at least one physical memory device to execute the calibration logic to perform uniformity compensation, including receiving print image measurement data corresponding to primary color markings and secondary color markings printed by pel forming elements, wherein each of the pel forming elements is associated with one of a plurality of primary colors, generating a first set of transfer functions, wherein the first set of transfer functions include a transfer function for each of the pel forming elements associated with a primary color, generating a second set of transfer functions, wherein the second set of transfer functions include transfer functions for each of the pel forming elements associated with a plurality of secondary colors and generating a set of uniformity compensated transfer functions, wherein the set of uniformity compensated transfer functions include a transfer function for each of the pel forming elements based on the first set of transfer functions and the corresponding second set of transfer functions.

A processor maintains image quality degradation for a printing device. A communications device receives a print job that includes instructions to print a plurality of printed sheets in a sheet printing sequence. The processor generates a predicted output image for a mid-job sheet of the printed sheets based on the image quality degradation and the sheet count of the mid-job sheet within the sheet printing sequence. The printing engine alter printing characteristics to print a proof sheet matching an appearance of the predicted output image.